摘要:
The invention relates to a low-pressure discharge lamp comprising a glass discharge vessel (1) which is substantially tubular in form and which is closed in a gas-tight manner on the ends thereof, a filling consisting of an inert gas mixture and quicksilver, in addition to an optional luminous coating on the inner wall of the discharge vessel (1). Two current supply inlets are respectively melted into the two ends of the discharge vessel (1), with a helical electrode secured thereto (5). The invention is characterized in that in order to increase the switching resistance of the lamp in a cold start operation, at least one other electrode (7,8) made of a conductive material is arranged in the region between the helical electrode (5) and the connecting end of the discharge vessel (1) and one end of said other electrode (7, 8) is electrically connected to one of the two current supply inlets (3,4).
摘要:
A method for measuring a fill level of a fill substance in a container, in which, in an empty container, at least a part of the microwave signals transmitted into the container is reflected back via a reflection on a floor of the container. Microwave signals are transmitted into the container and their fractions reflected back to the fill-level measuring device. These are received as received signals. Echo functions are derived, which show amplitudes of the received signals as a function of a position corresponding to their travel time traveled in the container. A container floor echo is detected at a position, which lies in an earlier determined, both sides limited, empty echo position range, in which the container floor echo occurs in the case of empty container, at an empty echo position dependent on a shape of the container and an installed position of the fill-level measuring device.
摘要:
A method for ascertaining and monitoring fill level of a medium in a container by means of a field device by a travel time measuring method, wherein transmission signals are transmitted in the direction of the medium and reflection signals are received, wherein received reflection signals are registered as echo signals in an echo function dependent on travel time or travel distance, wherein position and/or amplitude at least of a wanted echo signal in the echo function are/is ascertained by means of an echo search algorithm and a continuous echo tracking of changes of position and/or of changes of amplitude of the wanted echo signal in the echo function is performed in a defined search window, wherein position and/or amplitude at least of a wanted echo signal is maintained, in case no wanted echo signal is ascertained in the search window, wherein from position and/or amplitude at least of a wanted echo signal, fill level is ascertained, and wherein a measured value of fill level is output. For this, an asymmetric search window is used for ascertaining the wanted echo signal.
摘要:
The invention relates to a mercury source for a low-pressure discharge lamp comprising an amalgam body which is arranged on a front surface of a wire or enclosed in a perforated structure. The amalgam body or the perforated structure is provided with a protective coating with a getter effect. The invention enables a simple production process to be implemented with low costs in terms of materials.
摘要:
The invention relates to a discharge lamp comprising a discharge vessel (2) and an electrode frame (3) which is provided with a lamp coil (33) and at least some sections of which extend into the discharge vessel (2). Electrode holders (31, 32) are connected to a glass bead (34), at least some areas of which are sealed into an end region (21) of the discharge vessel (2).
摘要:
The invention relates to a device for determining and/or monitoring a process variable. The aim of the invention is to provide a cost-effective, user-friendly device for determining and/or monitoring a process variable. The inventive device comprises the following elements: a sensor, a measuring/regulating/control unit which pre-defines at least one event to be determined or monitored, and at least one memory unit which stores data according to the at least one pre-defined event. The sensor, the measuring/regulating/control unit and the memory unit form a compact unit or an independent field appliance.
摘要:
The invention relates to a method for producing and inserting an electrode frame (1′) comprising a lamp coil (6) into a discharge vessel (7) of a discharge lamp. In said method, the following steps are carried out: a) two separate electrode holders (2′, 3′) are provided in the form of substantially elongate wires; b) an elongate brace (8) is fastened to the two spaced-apart electrode holders (2′, 3′); c) the lamp coil (6) is mounted on forward end regions (21, 31) of the electrode holders (2′, 3′); d) some sections of the electrode frame (1′) produced in steps a) to c) are inserted into the discharge vessel (7).
摘要:
Disclosed is a starter member to which a mercury-absorbing layer is applied and which can be used in low-pressure mercury discharge lamps. A starter member for a low-pressure amalgam discharge lamp comprises a mercury-absorbing layer on a base. A coating layer which is provided on the mercury-absorbing layer has a getter effect and prevents the material of the mercury-absorbing layer from coming off.
摘要:
A method for measuring a fill level of a fill substance in a container, in which, in an empty container, at least a part of the microwave signals transmitted into the container is reflected back via a reflection on a floor of the container. Microwave signals are transmitted into the container and their fractions reflected back to the fill-level measuring device. These are received as received signals. Echo functions are derived, which show amplitudes of the received signals as a function of a position corresponding to their travel time traveled in the container. A container floor echo is detected at a position, which lies in an earlier determined, both sides limited, empty echo position range, in which the container floor echo occurs in the case of empty container, at an empty echo position dependent on a shape of the container and an installed position of the fill-level measuring device.
摘要:
The invention relates to a mercury source for a low-pressure discharge lamp comprising an amalgam body which is arranged on a front surface of a wire or enclosed in a perforated structure. The amalgam body or the perforated structure is provided with a protective coating with a getter effect. The invention enables a simple production process to be implemented with low costs in terms of materials.